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Możliwości wykrywania spoiw zawierających substancje białkowe metodą spektrofotometrii absorpcyjnej w podczerwieni

100%
Rogóż M.
Ochrona Zabytków
|
1992
|
issue 3
246-251
EN
The work establishes the possibility of detecting albumen binders in samples of albumen and albumen binders, both pure and mixed with pigments. Such binders as: whole egg, egg yolks, gelatine and casein were chosen for the purpose of the analysis. The albumen and tempera binders were combined with the following pigments: lead white, copper blue, iron red and plant black. The selected method of infrared absorption spectrophotommetry made it possible to identify albumen binders in samples no smaller than 2 mg. This method, however, does not distinguish them qualitatively and only indicates gelatine, due to its appearance as a strand in 1400 cm"-1. The presence of pigments does not hinder the identification of pure albumen and albumen-oil binders. (translated by A. Rodzińska-Chojnowska)
2
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Badania fizykochemiczne malowidła ściennego z kościoła w Działoszycach

51%
Ligęza M., Karaszkiewicz P., Rogóż M.
Ochrona Zabytków
|
1992
|
issue 3
236-239
EN
The examination of samples of paint material from the composition in question was conducted with the help of different physico-chemical methods. The pigments were analysed by means of microchemical, microscopic and spectral methods. The X-ray difraction method made it possible to determine variant I of the zinc-lear yellow hue, and infra-red absorption spectphotommetry conformed the presence of azurite. The spectral emmission analysis was implemented for the whole range of colours in the Gothic mural, and it was discovered that arsenic is present in the azurite, and zinc - in the natural Earth pigments. An analysis of samples of binders was conducted with thin-layer chromatography and absorption spectophotometry. It was found that binder used was casein. Chemical methods and microscopic observation of the ground provide information about the quanntitative composition of the binder, the filler and the hydraulic additives. (translated by A. Rodzińska-Chojnowska)
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